Gustav jacob lesser



UNITED STATES PATENT OFFICE.

GUSTAV JACOB LESSER, OF FRANKEORT-ON-THE-MAIN, GERMANY, ASSIGNOR TO ROBERT E. LESTER, OF NEW YORK, N. Y.

PLASTIC AND ELASTIC COMPOSITION FOR FORMING ELASTIC ROLLS, ELASTIC PADS, AND FOR OTHER USEFUL PURPOSES.

SPECIFICATION forming part of Letters Patent No. 276,607, dated. May 1, 1883.

Application filed March 29, 1883. (N0 specimens.)

To all whom it may concern Be it known that I, GUSTAV JACOB LEs- SER, of Franktbrt-on-the-Main, Germany, have invented a certain new and Improved Plastic apd Elastic Composition for Forming Elastic Rolls, Elastic Pads, and for other Useful Purposes,of which the following is a specification.

The object of this invention is to manufacture a plastic and elastic composition which may be softened by heat and then molded into any desired form. it consists in combining glue, gelatine, lead compounds, glucose, either white or brown,

such as is obtained from corn, and glycerine with water, so as to produce a permanent nondeca-yiug compound or compounds, applicable tjor forming elastic rolls, elastic pads, inking rolls and pads, and for other useful purposes. The glue and gelatine preferred is that made from the skins of fur-produciug animals, from glove leather, and from the bones of small animals.

My process is as follows: I take twentyfive pounds of glue, and of this I take twelve and a half pounds of glue and six pounds of gelatine and put them to soak for about twentyfour hours in twenty-eight pounds of soft water which has been previously boiledfcooled, and cleared. The other twelve and a half pounds of. glue I put to soak in twenty-five pounds of glucose, which I previously-melt to very thin liquid, and allow it to soak for about twen ty-four hours. I then put the quantity of glue and gelatine in a copper boiler and let it melt by a slow fire or steam, and when entirely melted I add one pound of extract of lead in a very clear liquid (this liquid of 28 Baum) to about five pounds of the water in which the glue has been soaked, sometimes in clear Water. This extract must lodge for two or three hours in the water and mix thoroughly with the glue and gelatine. I then add the other twelve and a half pounds of glue and |glueose, which is melted at the same time,

and in which I add fifteen pounds of glycerine. mix all thoroughly, remove, and let it cool off for two or three days.- The water previously boiled will prevent the mildew. The extract of lead makes the composition in whole harder. The glucose, which generally contains a slight quantity of acid, will also preserve the material, and the glycerine finishes the same in making itstill more tough.

The great objection to the compositiouheretofore used has been that it only will keep for a short time. After a month or two it will get mildewed or shrink up, and also for the reason that it is-not always made uniform, owing to different qualities of sirup and glyceriue, which are chiefly used for the purpose.

I do not limit myself to the exact proportions or manner of mixing named, as these may be varied to some extent without departing from the principles of my invention.

Having thus described my invention, what I claim is 1'. The improved plastic and elastic compound herein described, consisting of glue orgelatine, combined with glucose, a lead salt, and glycerine, by means of water, substantially as set forth.

2. The combination of glue or gelatine, extract of lead, glucose, and glyceriue, in substantially the proportions set forth. I

3. The process of forming a plastic and elastic compound by first forming a glue or gelatine with a lead compound, combining said compound with a compound of glue and glucose,with glycerine added, substantially as set forth.

In witness whereof I have hereunto set my GUSTAV JACOB LESSER. Witnesses:

F. VOGELER, 'J. GRUND.

hand. 

